1SMB36AT3 Equivalent & Substitute Parts

Part Overview

The 1SMB36AT3 is a transient voltage suppressor (TVS) diode manufactured by onsemi, designed for general-purpose voltage clamping applications. This component features a 36V reverse standoff voltage with a 58.1V maximum clamping voltage and is housed in an SMB package. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

1SMB36AT3

onsemiIn Stock: 25841SMB36AT3 Datasheet

Current PartRFQ

SMBJ36A

EVVO SemiIn Stock: 122275SMBJ36A Datasheet

DirectRFQ

SMBJ36A

EVVO SemiIn Stock: 122275SMBJ36A Datasheet

DirectRFQ

PTVS36VP1UP,115

Nexperia USA Inc.In Stock: 2030PTVS36VP1UP,115 Datasheet

SimilarRFQ

SMBJ33A-TR

STMicroelectronicsIn Stock: 5301SMBJ33A-TR Datasheet

SimilarRFQ

SMBJ36A-13-F

Diodes IncorporatedIn Stock: 113275SMBJ36A-13-F Datasheet

SimilarRFQ

SMBJ36A-TP

Micro Commercial CoIn Stock: 3075SMBJ36A-TP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 1SMB36AT3 is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Voltage - Reverse Standoff (Typ): 36V
• Voltage - Clamping (Max) @ Ipp: 58.1V
• Current - Peak Pulse (10/1000µs): 10.3A to 10.4A
• Power - Peak Pulse: 600W
• Type: Zener diode, unidirectional

Mechanical Compatibility Criteria:

• Mounting Type: Surface Mount
• Package / Case: SMB (DO-214AA) or equivalent footprint
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts are grouped into two categories: direct equivalents (matching all electrical and mechanical parameters) and similar alternatives (matching core electrical specifications with minor package variations).

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (Recommended Primary Substitutes):

SMBJ36A-13-F (Diodes Incorporated) and SMBJ36A-TP (Micro Commercial Co) are the preferred direct substitutes. Both maintain identical electrical specifications (36V standoff, 58.1V clamping, 10.3A peak pulse) and use the standard SMB (DO-214AA) package. Both are active products with ROHS3 compliance and unlimited moisture sensitivity rating. SMBJ36A-13-F offers standard operating temperature range (-55°C to 150°C), while SMBJ36A-TP extends to 175°C, providing additional thermal margin for demanding applications.

SMBJ36A (EVVO Semi) is functionally equivalent with identical electrical parameters and SMB package compatibility. It offers the widest operating temperature range (-65°C to 150°C) and maintains active product status with ROHS3 compliance.

Alternative Substitute (Package Variation):

PTVS36VP1UP,115 (Nexperia USA Inc.) matches all critical electrical parameters but uses a SOD-128 package instead of SMB. This part is automotive-qualified (AEC-Q101) and suitable for applications requiring automotive-grade reliability. PCB layout and footprint modifications are required for this substitution.

Voltage-Variant Alternative:

SMBJ33A-TR (STMicroelectronics) operates at a lower reverse standoff voltage (33V) with reduced clamping voltage (53.3V). This part is suitable only for applications with lower voltage requirements and is not a direct substitute for 36V-rated designs.

Frequently Asked Questions (FAQ)

Q: Can I use SMBJ36A-13-F as a direct replacement for 1SMB36AT3?

A: Yes. SMBJ36A-13-F matches the critical electrical parameters (36V standoff, 58.1V clamping, 10.3A peak pulse) and uses the same SMB (DO-214AA) package. Both are surface-mount components with identical footprints. The primary difference is that SMBJ36A-13-F is an active product with ROHS3 compliance, whereas the original part is obsolete and RoHS non-compliant.

Q: What is the difference between SMBJ36A-TP and SMBJ36A-13-F?

A: Both parts are electrically identical with 36V standoff and 58.1V clamping specifications. The primary difference is operating temperature range: SMBJ36A-TP operates from -55°C to 175°C, while SMBJ36A-13-F operates from -55°C to 150°C. SMBJ36A-TP is preferred for high-temperature applications. Both use SMB packaging and are ROHS3 compliant.

Q: Why is PTVS36VP1UP,115 listed as a similar substitute rather than a direct equivalent?

A: PTVS36VP1UP,115 matches all electrical specifications but uses a SOD-128 package instead of SMB (DO-214AA). This requires PCB layout changes and different mounting procedures. However, it offers automotive-grade qualification (AEC-Q101), making it suitable for automotive applications where the original SMB package is not required.

Q: Can I use SMBJ33A-TR instead of 1SMB36AT3?

A: SMBJ33A-TR is not a direct substitute. It operates at 33V reverse standoff with 53.3V clamping voltage, compared to the 36V standoff and 58.1V clamping of the original part. Use SMBJ33A-TR only in applications specifically designed for 33V operation. For 36V applications, use SMBJ36A-13-F, SMBJ36A-TP, or SMBJ36A instead.

Q: Are all substitute parts RoHS compliant?

A: All active substitute parts listed (SMBJ36A, SMBJ36A-13-F, SMBJ36A-TP, PTVS36VP1UP,115, and SMBJ33A-TR) are ROHS3 compliant. The original 1SMB36AT3 is RoHS non-compliant. If RoHS compliance is required for your application, any of the listed substitutes will meet this requirement.

Q: What is the moisture sensitivity level for these TVS diodes?

A: All parts listed, including the original 1SMB36AT3 and all substitutes, have Moisture Sensitivity Level (MSL) 1, which indicates unlimited shelf life and no special moisture control requirements during storage or handling.